Hello! You can find a list of games which may have issues here https://www.playstation.com/get-help/help-library/my-account/access-and-details/change-online-id-games/ …
Checking the list, Overwatch and Fortnite have no known issues when changing your Online ID. ^PS

Hey guys Alex is here to explain! The joke here is that the slogan for the brand “Nerf” is “its nerf or nothing.” So in the image, it says that you can only choose one of the things that the guy is holding, you can either choose the option “nerf” or the option “nothing” just like in their slogan!
And hey if you’ve read this far, you might as well follow! I explain memes like this all the time :) @alexplains_